Selective mass enhancement close to the quantum critical point in BaFe2(As1-xPx)2

Grinenko, V.; Iida, K.; Kurth, F.; Efremov, D. V.; Drechsler, S. -L.; Cherniavskii, I.; Morozov, I.; Hänisch, J.; Förster, T.; Tarantini, C.; Jaroszynski, J.; Maiorov, B.; Jaime, M.; Yamamoto, A.; Nakamura, I.; Fujimoto, R.; Hatano, T.; Ikuta, H.; Hühne, R.

doi:10.1038/s41598-017-04724-3

Selective mass enhancement close to the quantum critical point in BaFe₂(As_1-xP_x)₂

Journal Article · Tue Jul 04 00:00:00 EDT 2017 · Scientific Reports

DOI:https://doi.org/10.1038/s41598-017-04724-3· OSTI ID:1396128

Grinenko, V. ^[1]; ^[2]; Kurth, F. ^[1]; Efremov, D. V. ^[2]; Drechsler, S. -L. ^[2]; Cherniavskii, I. ^[3]; Morozov, I. ^[4]; Hänisch, J. ^[5]; Förster, T. ^[6]; Tarantini, C. ^[7]; Jaroszynski, J. ^[7]; Maiorov, B. ^[8]; Jaime, M. ^[8]; Yamamoto, A. ^[9]; Nakamura, I. ^[10]; Fujimoto, R. ^[10]; Hatano, T. ^[10]; Ikuta, H. ^[10]; Hühne, R. ^[2]

Dresden Univ. of Technology (Germany); Leibniz Inst. for Solid State and Materials Research (IFW), Dresden (Germany)
Leibniz Inst. for Solid State and Materials Research (IFW), Dresden (Germany)
Lomonosov Moscow State Univ. (Russian Federation)
Leibniz Inst. for Solid State and Materials Research (IFW), Dresden (Germany); Lomonosov Moscow State Univ. (Russian Federation)
Leibniz Inst. for Solid State and Materials Research (IFW), Dresden (Germany); Karlsruhe Inst. of Technology (KIT) (Germany)
Helmholtz-Zentrum Dresden-Rossendorf, Dresden (Germany)
Florida State Univ., Tallahassee, FL (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Tokyo Univ. of Agriculture and Technology (Japan)
Nagoya Univ. (Japan)

A quantum critical point (QCP) is currently being conjectured for the BaFe₂(As_1-xP_x)₂ system at the critical value x_c ≈ 0.3. In the proximity of a QCP, all thermodynamic and transport properties are expected to scale with a single characteristic energy, given by the quantum fluctuations. Such a universal behavior has not, however, been found in the superconducting upper critical field H_c2. Here we report H_c2 data for epitaxial thin films extracted from the electrical resistance measured in very high magnetic fields up to 67 Tesla. Using a multi-band analysis we find that H_c2 is sensitive to the QCP, implying a significant charge carrier effective mass enhancement at the doping-induced QCP that is essentially band-dependent. Our results point to two qualitatively different groups of electrons in BaFe₂(As_1-xP_x)₂. The first one (possibly associated to hot spots or whole Fermi sheets) has a strong mass enhancement at the QCP, and the second one is insensitive to the QCP. The observed duality could also be present in many other quantum critical systems.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1396128

Report Number(s):: LA-UR-17-23671

Journal Information:: Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 7; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Fe-based superconducting thin films—preparation and tuning of superconducting properties Hänisch, J.; Iida, K.; Hühne, R. Superconductor Science and Technology, Vol. 32, Issue 9 https://doi.org/10.1088/1361-6668/ab1c00	journal	August 2019
Universal scaling behavior of the upper critical field in strained FeSe _0.7 Te _0.3 thin films Yuan, Feifei; Grinenko, Vadim; Iida, Kazumasa New Journal of Physics, Vol. 20, Issue 9 https://doi.org/10.1088/1367-2630/aade66	journal	September 2018
Mass divergence type metal-insulator transition in charge transfer rare-earth nickelates Santhosh Kumar, K.; Phanindra, E. V.; Rana, D. S. Physical Review B, Vol. 100, Issue 12 https://doi.org/10.1103/physrevb.100.125127	journal	September 2019

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